Well, thanks for downloading my mod! Original map is by Unknown-D (I think) and is under the name of Call Of Duty 4 Combo Pack.  Well, I'll go over the changes here:

MOST IMPORTANT: When you kill a sniper, they drop an active camo that you can pick up. The camo lasts for the usual 45 sec (if I remember correctly) and is VERY useful when playing on Legendary.  A recommended tactic for this map is stealth.  Using that tip above in Legendary mode, maneuver around the map while invisible and kill the snipers so that they drop another active camo.  Then stand on that camo until you pick it up and quickly advance to the next area. If you're the run and gun type then you will die, I guaranty it. In Normal or Easy you shouldn't need the camo to be stealthy though, as enemies are stupider XD

Here here the enemy specs for you:

Elites:
   Majors: Sniper, drop Active Camo, can see and hear you from REALLY far away and kill you in one shot before you have a chance to react. Legendary tip: Keep moving if at long distances since the bullet takes half a second to reach you. At close distance just hide and toss nades around the corner.
   
   Minors: M249 SAW, drop Healthpack, normal vision.
   
   Stealth Elites: Shotgun, drop Active Camo, very dangerous in groups of 2 or more...I once was stuck on one part of the level for half an hour on legendary mode because of those damn shotguns...recommend you nade the hell out of the room before you run in and spray these invisible assassins.

Grunts: 
   Majors: AK-47
   Minors: same

Jackals:
   Majors: Non-Automatic M4, very deaf...I was sneaking behind a pack of 4 and melee'd them all in the back one by one...never heard each other die >:D (bad-ass award, rite?)
   Minors: samesies 


WEAPONS SPECS (not counting Halo AR and pistol):

AK-47: low damage but great accuracy when zoomed in, medium clip, high bullet speed.

Benelli Shotgun: High DMG at close distance

M16: Great at long distances and close, able to take out most enemies with one 3 shot burst at any distance (if all 3 bullets hit 'em).  An M203 Grenade Launcher is included, use the grenade button to use. Medium bullet speed.

M249 SAW: 200 Round clip, high ROF, accurate for first few shots at long distance but then gets inaccurate. A good close-quarters weapon. Medium bullet speed.

M4: A non-automatic M4 assault rifle. Takes out most foes with a headshot, except other M4 wielding enemies. Good for long distance. High bullet speed.

M82A1: Your all-around great sniper. Has a 99% chance of an instant kill and is great for long distance (obviously). There is a slow bullet speed that really comes into effect at long range. Its approx. 0.5 seconds at 300m-400m but it really effects a shot at a running target. Hate the slow bullet speed? It'll save your ass from a sniper bearing down on you across that valley, keep moving until you find cover and then peek out and snipe him back.

Wow, that was fun to write. Have fun with the mod!